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Wyszukujesz frazę "87.50.Gi" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Single Proton Hit Facility at the IFJ PAN in Cracow
    Autorzy:
    Polak, W.
    Lekki, J.
    Veselov, O.
    Stachura, Z.
    Styczeń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044772.pdf
    Data publikacji:
    2006-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    87.50.-a
    Opis:
    This work presents the final development stage and optimization results of the single proton hit facility in Cracow. The setup parameters: proton beam energy 2 MeV, hit resolution 30μm, intensity ≈1000 proton/s, proton registration efficiency 100%, blanking efficiency 99.8%. On-line observation allows targeting cells inside a Petri dish mounted at a 3D precise moving stage. To target a particular cell a semiautomatic cell visualization and recognition system is used.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 3; 417-420
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Scanner for 3D Radiotherapy Polymer Gel Dosimetry
    Autorzy:
    Sobotka, P.
    Kozicki, M.
    Maras, P.
    Boniecki, Ł.
    Kacperski, K.
    Domański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418096.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    42.66.Si
    87.53.Bn
    Opis:
    Sophisticated techniques employed in radiotherapy for irradiation of tumours require comprehensive dosimetry allowing for precise, high resolution measurements of radiation dose distribution in three dimensions and verification of treatment planning systems. Polymer gel dosimetry has been shown to be a unique technique for such the purpose. If exposed to ionizing radiation, radical polymerisation and crosslinking of monomeric components take place in a 3D polymer gel dosimeter, leading to the formation of large polymeric structures that scatter visible light. This feature allows for optical observation of the effects of the absorbed dose and its distribution. Presently, magnetic resonance imaging is employed most often for the analysis of the 3D polymer gel dosimeters. However, much attention is also being given to the development of optical computed tomography since this technique is hoped to serve as a substitute for expensive and not easily available magnetic resonance imaging. The optical scanner presented in this work consists of a laser diode, a scanning system and a signal detector. A 3D polymer gel dosimeter is measured in an immersion liquid in order to reduce deflection of the light from the dosimeter phantom. The very first results were obtained with the newly constructed scanner and $\text{PABIG}^{nx}$ 3D polymer gel dosimeter, which was inhomogeneously irradiated with $\text{}^{192} Ir$ brachytherapy source. The results have been contrasted with those for the magnetic resonance imaging and are presented in this work together with the description of the developed instrument. Currently, the optimization of the optical scanner is performed.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 969-974
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Irradiation of Living Cells with Single Ions at the Ion Microprobe SNAKE
    Autorzy:
    Hauptner, A.
    Cremer, T.
    Deutsch, M.
    Dietzel, S.
    Drexler, G. A.
    Greubel, C.
    Hable, V.
    Krücken, R.
    Löwe, R.
    Strickfaden, H.
    Dollinger, G.
    Friedl, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044655.pdf
    Data publikacji:
    2006-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.27.Eg
    61.80.Jh
    87.16.Sr
    87.50.Gi
    Opis:
    The irradiation setup at the ion microprobe SNAKE is used to irradiate living cells with single energetic ions. The irradiation accuracy of 0.55μm and respectively 0.40μm allows to irradiate substructures of the cell nucleus. By the choice of ion atomic number and energy the irradiation can be performed with a damage density adjustable over more than three orders of magnitude. Immunofluorescence detection techniques show the distribution of proteins involved in the repair of DNA double-strand breaks. In one of the first experiments the kinetics of appearance of irradiation-induced foci in living HeLa cells was examined. In other experiments a new effect was detected which concerned the interaction between irradiation events performed at different time points within the same cell nucleus.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 3; 273-278
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of Barite and Boroncarbide Doped Radiation Shielding Polymer Composite Panels
    Autorzy:
    Evcin, O.
    Evcin, A.
    Bezir, N.
    Akkurt, İ.
    Günoğlu, K.
    Ersoy, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031261.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    94.10.Gb
    28.41.Te
    78.66.Sq
    29.30.Kv
    Opis:
    Developments in nuclear technology in the last century have lead to the use of radiation in different areas of human activity. These are not just the energetics but also food, agriculture, medicine, industry and science. Thus, radiation has become an inevitable phenomenon in our lives. Since we cannot isolate radiation from our life, the radiation protection methods should be available. As alternatives to conventional radiation prevention methods, such as lead and heavy concrete shielding, more functional materials need to become the focus of research. The development of the least harmful to the environment, easily applicable, flexible radiation shields has become very important. In this study, silicon matrix composite panels, doped with different ratios of barite and boron carbide, were produced and characterized by optical and scanning electron microscopy (SEM). Gamma and neutron radiation shielding properties of these materials were investigated. The results have been compared with the lead as the standard shielding material.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1145-1148
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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